The writing process for the majority of Metallicaâs albums have followed the same process. A large slew of guitar riffs written primarily by James Hetfield, sometimes Kirk Hammett, and rarely the bandâs bass player, (that now being bass virtuoso Robert Trujillo) are reviewed and selected.
1 Delhi is most polluted city in the world in PM2.5 concentrations. 2  Half of the top 20 most polluted cities were in India, according to data.  PM2.5 is considered most harmful to health.
Here are the 10 most polluted places, and you can see images of the horror above. 1  Agbogbloshie, Ghana: Lead. 2  Chernobyl, Ukraine: Radioactive dust including uranium, plutonium, cesium-137, strontium-90, and other metals. 3  Citarum River, Indonesia: Numerous chemicals including lead, cadmium, chromium, and pesticides.